Friction shock-absorbing mechanism



2 Sheets-Sheet l May l, 1923.

J. F. OCONNOR FRICTION SHOCK ABSORBING MEGHANISM Filedben '4, 1920 S Nw HS May l, 1923.

J. F. OCON NOR FRICTION S Filed oct'. 4, 1920 HOGK4 ABS ORBING VMECHANISM 2 sheds-sheet 2 l flu/@Jafar Patented May 1, 1923.

'risate uNrreD sfr/:eres ra-rent entice;

JoHNnocoNNoa, 01E-CHICAGO, ILLINOIS, Assrenongre .WILLIAM QHMINER, or en /tzr,.NewYoerij l FRICrIo-N SHQGK-AeSQRBING MECHANlSJ-r,

Appliationled `ctolier 4,1920. Serial No. 414,668,

One object of the invention is tol provide i a friction shock'absorbing mechanism adapted more particularly for railway draft'rig-l gings .and specifically ,for lometi@ ,tendere the. mechanisnnl. haying' unusually high capacity., A

More specifically, thepbjeet of the invention is to proyide al-V frictieirshock absorbing' mechanism `having -a klarge number of *sep'af` rate .sets of friction surfaces combined with a largenumberof springs, the arrangement z bein'gssuclrthat Wear on VVthe friction-'parts may be automatic'allly' compensa-ted fon In the Hdrawing; v forming a' part of -this tu'dinal sectional. View` of a portion ofa im railway rlrft..reee@betingmy improved ments'in c'onneeti`ontherewith;4 Figurey 2 is a yertical Along'gitudiiial sectional. View corre- `spending4 substantially ltothe line Q -2 of Figure Figures 31 and 4' are i vertical transversesectional views corresponding to the lines 3- 3 and 144 respectively :in Figilrel.`v And Figure 5 is a detailed per-A spectiye of a block employed Vwithl my implerements.

'Insaid drawings? lO-lO denote channel center or draft 1ofafrailiraycar to the innerfaces ofjivliich are secured front stop lugs 1 1 andrearstoplugs' 12. The rear port1on.of thef 'draw har is indicateddat 13`r the` Sa' beine' 'QPQI-etiifly .j SSCatQd With th? berbeflifaljsn Prever by@ i tQyReQ14 fand coupler k a l associate d 4inc )vabl'e rfi.A plates 16x-216.!

and springfolloiyers a plurality of transverselyl arranged coil springislCg-QC; a 5.5

4front main folloWer'D.; apairof'longitiitlinally arranged preliminaryf 4 coil;- springs' The castingrA, in over-all"Widthjv corresponds approximately to tli'efspacebettyeeuiro the; draft si 1lfs,` said casting beingA .of fgene ally rectangular outline' an'djwwithv yreal' inf tegral -Wallf17fadapted` to cooperate'ffwitli the fstop `lugs 12n O'nthe li nt eri r,`"the' sliellf casting iA is proyided on eafchI Vside' of 1the',' 65 longitudinal center line. thereof "Witlijsetsfoif'fr'iC-tion surfiLCeSflSlS 'on one si.de and 11s- 11,8 0n. the other Side. Aildfthejffi-j tion surfaces 18 of the' one setyeritendn the same general directiomj that' is the 'same are 1 70 inclined yinwardly andnrearwarldly toward the center of theshell.H ""Iliepfriction"sur;- l iaes 118 of themothernset are correspon 7 ingly 'all inclined in Ithe same directionth'at f" is, lrearwardly and 'nwardlyv of fthe shell. 7 5 The interior oftheicasting alsotormedf with a plurality of transversely'entendintf shoulders 19-19 at the 'ou'ter'ends of "e'iielr y ofthe friction surfaces 18 anlllS.

The combined spring followerszfand frietion. shoesv B/'are of like 'constructionfl 'and i each is iny the natureof an elongated'ele ment of UcrOss-section asindiatjedmest clearly in Figure ifthatmis, the'v'top a'ngl" bottomv armsjol the il indiratedlat@ and '85 21 entend horizontally7 and are connect-ed by a vertical web l22. Ontlie outer-side;` eiielr' member B is formed Withua series of 4in clinfed 'friction surfaces 24T-24,"corresponding iif slo l e to and co-op'erablewithA-'th'e rsp'ec'tiye'UO Shel friction ,surfaces 18`i and "118; The members .B.. are alsof'provided with] transversely extending' shoulders 25 vnorn'ia'l.ly disposed adjacentrv to 'fbutfslightly spa-ced from the transyersely",extending, shoulders 19 of the shelll In normal position the r members they are "separated 'as' clearly' shown in" F lgurei butY the' saine fareadapted;v tof come` together upon' Y fullV eompressionf'of f thiefme'hanisin@'v` The f springs@ are4 shownas' fire in mungv ber and preferably bne'foieach" setj 'of i posed friction surfe'clesI 18 and clearly indicated i in Figure' -1',Y"tl`e spring C Y areconnedivithin fthe members an an@ weer' @weiterenmove longitudinally in unison with the members B. At the outer ends of the members B, detachable blocks F are employed, one for each member B. Each block F has a concave inner face 26 conforming to the outermost springs C so as to properly guide and center the latter. The blocks F are furthermore formed with squared lugs 27 and 28 engaging in correspondingly shaped slots in the members B to hold the blocks in proper relation therewith.

The front main follower D is formed with an inwardly extended rectangular casing 29 adapted to telescope within the open or mouth end of the friction shell casting A. As will be seen from aninspection of Figures 1 and 2, the follower D is provided with shoulders 30 surrounding the casing 29 which shoulders will engage with the outer end 31 of the friction shell to limit relative movement between the follower D and shell casting A. The two preliminaryr springs E are sposed within the casing 29, said springs being centered on bosses Y 82 formed on thev follower D and other D and the other two followers G'. The latter are slipped within the shell between the outer ends of the members and the outermost set of transversely extending shell shoulders 19, as clearly shown in Figure 1. Only a comparatively small space is left between the inner edge of the casingv 29 and the followers G for the preliminary spring action.

The operation is as follows, assuming a pulling or draft movement of the draw bar. As the draw bar moves outwardly under draft, the friction shell casting A will be pulled in the same direction in unison therewith. rIhe front follower D will of course remain stationary in its engagement with the front stop lugs 11. -During the first portion of the outward movement of the shell casting A,no frictional action will occur but on the contrary merely a spring action in the springs E until the followers G. engage the inner edge of the casing 29. Thereafter the followers G will be held stationary andthe members B prevented from longitudinal movement outwardly with the friction shell A. As the' friction shell A continues its outward movement, it is evident that the inclined friction surfaces 18 and 118 thereof will force or squeeze the elements B inwardly toward each other, thus generating a great amount of friction between all of the sets of cooperating inclined friction surfaces, the frictional resistance being augmented by the -sprin resistance. `The outward movementJ of the friction shell'A may continue until it engages with the shoulders 30 of the front Connecting bolts 8%34 place, the blocks F are inserted and then,`

the followers G are forced home between the ends of the members B and the outermost set of shoulders 19. The parts are so constructed, that during the last operation mentioned, the elements B will be forced rearwardly a slight amount so as to leave spaces between the shoulders 25 and 19. The reason for leaving the spaces indicated is to permit the elements B to laterallyadjust themselves to compensate for wear on the various friction surfaces. lThe follower D and springs E are applied last, as-will be understood.

I have herein shown and described what I now consider the preferred manner ofy carrying out the invention, but the same is merely illustrative and I contemplate all changes and modifications that come within the scope of the claims' appended hereto.

I claim:

1. In a friction shock absorbing mechanism, the combination with 'a longitudinally movable friction shell having a pair of opposed sets of interior friction surfaces, each set including a plurality of friction surfacesy all inclined in the same direction relatively` to the centre line of the shell, said shell being provided also with a. plurality of interior transversely extending shoulders adjacent said friction surfaces of the shell; of a pair of friction shoes within the shell, each shoe having a plurality of outer friction surfaces.

co-operable with those of one set of the shell,

each shoe having also a plurality of transversely extending shoulders normally disposed opposite the corresponding shoulders of the shell; spring means interposed between said shoes adapted to yieldingly resist relative movement therebetween; an auxiliary spring resistance; a lspring follower interposed between said auxiliaryV spring re-v sistance and the ends of said shoes; and a front follower (2o-acting with said auxiliaryspring resistance, said front follower having means thereon adapted to engage vthe spring follower to limit the compression of the auX- iliary spring resistance and' transmitv the pressure directly to said-,spring follower.

2. In a. friction shock absorbing mechanism, the combination with a longitudinally movable friction shell having a pairof opf shell; a pluralitT of transversely arranged day 0f Sept., 1920.

posed sets of interior friction surfaces; of having its interior conformed to centerthe a pair of friction shoes Within the shell, each adjacent transversely extending coil spring. 10 shoe having a plurality of outer friction sur- In Witness that I claim the foregoing I faces cooperalole with those of one set of the have hereunto subscribed my name this 15th coil springs interposed between said shoes;

.JOHN F, OCONNOR'. and a. removable block detachably mounted Witness: n v i on the outer end of each shoe, said block CARRIE GAILING. 

